cuelang.org/go@v0.10.1/internal/core/runtime/build.go (about)

     1  // Copyright 2020 CUE Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package runtime
    16  
    17  import (
    18  	"strings"
    19  
    20  	"cuelang.org/go/cue/ast"
    21  	"cuelang.org/go/cue/ast/astutil"
    22  	"cuelang.org/go/cue/build"
    23  	"cuelang.org/go/cue/errors"
    24  	"cuelang.org/go/cue/stats"
    25  	"cuelang.org/go/cue/token"
    26  	"cuelang.org/go/internal/core/adt"
    27  	"cuelang.org/go/internal/core/compile"
    28  )
    29  
    30  type Config struct {
    31  	Runtime    *Runtime
    32  	Filename   string
    33  	ImportPath string
    34  
    35  	Counts *stats.Counts
    36  
    37  	compile.Config
    38  }
    39  
    40  // Build builds b and all its transitive dependencies, insofar they have not
    41  // been build yet.
    42  func (x *Runtime) Build(cfg *Config, b *build.Instance) (v *adt.Vertex, errs errors.Error) {
    43  	if err := b.Complete(); err != nil {
    44  		return nil, b.Err
    45  	}
    46  	if v := x.getNodeFromInstance(b); v != nil {
    47  		return v, b.Err
    48  	}
    49  	// TODO: clear cache of old implementation.
    50  	// if s := b.ImportPath; s != "" {
    51  	// 	// Use cached result, if available.
    52  	// 	if v, err := x.LoadImport(s); v != nil || err != nil {
    53  	// 		return v, err
    54  	// 	}
    55  	// }
    56  
    57  	errs = b.Err
    58  
    59  	// Build transitive dependencies.
    60  	for _, file := range b.Files {
    61  		file.VisitImports(func(d *ast.ImportDecl) {
    62  			for _, s := range d.Specs {
    63  				errs = errors.Append(errs, x.buildSpec(cfg, b, s))
    64  			}
    65  		})
    66  	}
    67  
    68  	err := x.ResolveFiles(b)
    69  	errs = errors.Append(errs, err)
    70  
    71  	var cc *compile.Config
    72  	if cfg != nil {
    73  		cc = &cfg.Config
    74  	}
    75  	if cfg != nil && cfg.ImportPath != "" {
    76  		b.ImportPath = cfg.ImportPath
    77  		b.PkgName = astutil.ImportPathName(b.ImportPath)
    78  	}
    79  	v, err = compile.Files(cc, x, b.ID(), b.Files...)
    80  	errs = errors.Append(errs, err)
    81  
    82  	errs = errors.Append(errs, x.injectImplementations(b, v))
    83  
    84  	if errs != nil {
    85  		v = adt.ToVertex(&adt.Bottom{Err: errs})
    86  		b.Err = errs
    87  	}
    88  
    89  	x.AddInst(b.ImportPath, v, b)
    90  
    91  	return v, errs
    92  }
    93  
    94  func dummyLoad(token.Pos, string) *build.Instance { return nil }
    95  
    96  func (r *Runtime) Compile(cfg *Config, source interface{}) (*adt.Vertex, *build.Instance) {
    97  	ctx := build.NewContext()
    98  	var filename string
    99  	if cfg != nil && cfg.Filename != "" {
   100  		filename = cfg.Filename
   101  	}
   102  	p := ctx.NewInstance(filename, dummyLoad)
   103  	if err := p.AddFile(filename, source); err != nil {
   104  		return nil, p
   105  	}
   106  	v, _ := r.Build(cfg, p)
   107  	return v, p
   108  }
   109  
   110  func (r *Runtime) CompileFile(cfg *Config, file *ast.File) (*adt.Vertex, *build.Instance) {
   111  	ctx := build.NewContext()
   112  	filename := file.Filename
   113  	if cfg != nil && cfg.Filename != "" {
   114  		filename = cfg.Filename
   115  	}
   116  	p := ctx.NewInstance(filename, dummyLoad)
   117  	err := p.AddSyntax(file)
   118  	if err != nil {
   119  		return nil, p
   120  	}
   121  	p.PkgName = file.PackageName()
   122  	v, _ := r.Build(cfg, p)
   123  	return v, p
   124  }
   125  
   126  func (x *Runtime) buildSpec(cfg *Config, b *build.Instance, spec *ast.ImportSpec) (errs errors.Error) {
   127  	info, err := astutil.ParseImportSpec(spec)
   128  	if err != nil {
   129  		return errors.Promote(err, "invalid import path")
   130  	}
   131  
   132  	pkg := b.LookupImport(info.ID)
   133  	if pkg == nil {
   134  		if strings.Contains(info.ID, ".") {
   135  			return errors.Newf(spec.Pos(),
   136  				"package %q imported but not defined in %s",
   137  				info.ID, b.ImportPath)
   138  		} else if x.index.builtinPaths[info.ID] == nil {
   139  			return errors.Newf(spec.Pos(),
   140  				"builtin package %q undefined", info.ID)
   141  		}
   142  		return nil
   143  	}
   144  
   145  	if v := x.getNodeFromInstance(pkg); v != nil {
   146  		return pkg.Err
   147  	}
   148  
   149  	if _, err := x.Build(cfg, pkg); err != nil {
   150  		return err
   151  	}
   152  
   153  	return nil
   154  }